What is the end-to-end packet delay in this store-and-forward subnet? Host A 1 14 15 17 6 Host H What is the end-to-end packet delay in this store-and-forward subnet? Assume: All links: 2.5 km; C = 100Mbps; propagation speed = 200m/microsec. queueing delay = processing delay =0; packet size = 1000 bytes Solution: endtoend packet delay = 4 (equal hops) x link delay link delay = PROC +QD + TRANS + PROP = 0 + 0+ transm time + prop delay 1000 bytes 8 x 10**3 bits transm time = ------------- = ----------------- = 8 x 10 ** -5 = 80 microseconds. 100 Mbps 10**8 bps 2500 m prop delay = ---------------------- = 12.5 microseconds 200 m/ microsec link delay = 92.5 microseconds End-to-end subnet delay = 4 x 92.5 = 370 microseconds